Montgomery Curve とか Edwards Curveをsageで扱いたいとき、双有理同値なWeierstrass formの楕円曲線として扱うことができる。 https://gist.github.com/Pratyush/68c17a5ed34bb4323ed1b4641f5c181c 双有理同値ってなんだ……？

#angstromCTF2019 https://ctftime.org/task/8344 Introducing ångstromCTF Powerball, where the Grand Prize is a flag! All you need to do is guess 6 ball values, ranging from 0 to 4095. But don't worry, we'll give one for free! nc 54.159.113.2…